Learn how to add additional disk units to an existing SVC configuration (including configurations using IBM FlashSystems or IBM Storwize storage devices)
...
| Expand |
|---|
| title | Initializing and formatting non-configured units |
|---|
|
From the IBM i command line, type STRSST and press enter to start System service tools (SST). Sign on to SST with your service tools user ID and password. Select option 3: Work with disk units. Select option 3: Work with disk unit recovery. Select option 2: Disk unit problem recovery procedures. Select option 1: Initialize and format disk unit. Select option 1 on the new non-configured disk units that you want to be added to the ASP. Press F10 to confirm the choice to initialize and format the disk units. Exit the System Service tools.
|
4. If the configuration contains either Metro Mirror or Global Mirror configure replication set up the target SVC storage controller and IBM i.
| Expand |
|---|
| title | Configure Metro Mirror or Global Mirror Replication |
|---|
|
Create the new disk units on the target SVC storage controller. Create the remote copy relationship(s).
| Warning |
|---|
Important: Ensure that when creating the relationship, that you do not check the box indicating that the volumes are already synchronized. Similarly, if using the command line to create the relationships, do notuse the -sync parameter. Failure to follow this note will result in data corruption or loss and require restoring data from backup media. |
3. Start the remote copy relationship(s).
4. Wait for the remote copy relationship state to be either ‘Consistent Copying’ or ‘Consistent Synchronized’ depending on the configuration. 5. Stop the new remote copy relationship(s). Do not allow secondary read/write access. 6. Use the Change SVC Session (CHGSVCSSN) command with OPTION(*SUSPEND) to suspend the replication.
7. Add the remote copy relationship to the existing remote copy consistency group used by the environment. | Info |
|---|
Use the Display SVC Session (DSPSVCSSN) display to find the remote copy consistency group name. |
8. Use the Change SVC Session (CHGSVCSSN) command with OPTION(*RESUME) to resume the replication. 9. Assign these new disk units on the target SVC storage controller to the target IBM i. | Info |
|---|
Note: The disk unit resource names on the target system may be in the form DMPxxxx or DPHxxxx, where xxxx is a numeric value. Either value is okay, and disk resources starting with DPHxxxx will be converted to DMPxxxx upon performing PowerHA operations. |
|
...
| Expand |
|---|
| title | Adding new disk units to an ASP |
|---|
|
From the IBM i command line, type STRSST and press enter to start System service tools (SST). Sign on to SST with your service tools user ID and password. Select option 3: Work with disk units. Select option 2: Work with disk configuration. Select option 2: Add units to ASPs. Select option 3: Add units to existing ASPs. Enter the ASP number of the existing ASP to add units to, using the ASP number of the independent ASP.
| Info |
|---|
To find the ASP number of the existing IASP, use the Display ASP Status (DSPASPSTS) command. The ASP number will appear in the ASP Device field near the top left of the screen. |
8. Confirm the choice to add disk units. 9. Exit the System Service Tools. |
6. Update the source copy description using the Change SVC Copy Description (CHGSVCCPYD) command.
| Tip |
|---|
Tip:The joblog for the command will contain the following diagnostic message:
Message . . . . : The quantity of logical units does not match.
Cause . . . . . : The quantity of logical units specified in auxiliary
storage pool (ASP) copy description &1 does not match the quantity of
logical units specified in ASP copy description &2. All operations
performed on ASP session &3 will fail until the quantity of logical units in
both ASP copy descriptions match.
Recovery . . . : Update the quantity of logical units in one or both ASP
copy descriptions. Step 7 updates the second copy description to resolve this. |
...